SOLUTION: find n(a u b), given that n(A)=14, n(b)=11, and n(A ∩ B)=7

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Question 453700: find n(a u b), given that n(A)=14, n(b)=11, and n(A ∩ B)=7
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
n(A U B) = n(A) + n(B) - n(A ∩ B) = 14 + 11 - 7 = 18